Calaveras County is referenced in the article below as a good example of the problems.
CALAVERAS COUNTY COMMERCIAL MARIJUANA CULTIVATION BAN
On January 10, 2018 the Board of Supervisors adopted an ordinance banning commercial cannabis cultivation and other cannabis license types, with the exception of dispensaries which are regulated under a separate ordinance, Chapter 17.91. The ordinance will become effective on February 9, 2018. Commercial cultivators who successfully registered under the urgency ordinance adopted on May 10, 2016 or are still operating under an "application pending" status will have 90 days from the effective date of the ordinance to come into compliance with the ban.
ALL COMMERCIAL CANNABIS CULTIVATION & COMMERCE PROHIBITED; RECREATIONAL AND MEDICAL CANNABIS CULTIVATION PROHIBITED EXCEPT AS ALLOWED UNDER STATE LAW; REASONABLE REGULATION OF RECREATIONAL AND NON-COMMERCIAL MEDICAL CANNABIS CULTIVATION.
The people of Calaveras County recognize that the County needs to ban commercial cultivation of marijuana.
This commercial industry has moved into our communities, neighborhoods and County turning residential property zones into commercial marijuana cultivation zones. Many of these commercial grows are being protected with firearms, guard dogs and thugs. Commercial marijuana cultivation is presently causing environmental damage in Calaveras County. Violations at some purportedly organic grows include unlawful chemical releases, illegal use, storage, and disposal of hazardous materials and hazardous waste including fungicides, herbicides, pesticides, rodenticides, and use of some chemicals so toxic, they've been banned for years in the U.S. Growers are diverting our streams to support their marijuana irrigation systems, against the Clean Water Act. This type of activity is putting children and families health, safety and welfare at unnecessary risk. Regulation will not prohibit this commercial activity from taking place in your neighborhoods or keep it away from your families and your homes.
The Ban Commercial Cultivation group continues to be dedicated and working hard to get a ban on commercial cultivation of marijuana and commercial marijuana activities that are taking place in our neighborhoods and communities.
Regnery: Feds Should Prosecute California Marijuana Farmers for Devastating the Environment | Breitbart
In California, the crop ranks between lettuce and grapes; total sales in the state, according the Los Angeles Times, will top $21 billion by 2021. In Colorado, where marijuana is also legal, revenues stood at just over $1 billion last year, adding $2.4 billion to the state's economy.
San Andreas, CA...Breaking News...Calaveras Board of Supervisors just voted to ban commercial cannabis cultivation in the county. The vote was 3-2 after a motion failed for a vote on the regulation ordinance. The vote was Tofanelli, Mills & Clapp for the ban.
Calaveras County Cannabis
Researchers, law enforcement and others are raising alarms about toxic chemicals used on illegal grow sites in mountain forests and foothill areas of California where people grow and process marijuana, including Calaveras County and the Stanislaus National Forest. There's concern for more damage to watersheds, wildlife and water supplies, more
The environmental damage being done by pot grows in Calaveras is a serious issue folks. "Asked if anyone with Calaveras County is tracking or trying to track how much toxic waste is coming off illegal and LEGAL, registered grows in Calaveras County, Brad Banner, the county’s environmental management administrator, said, “We're trying to get a handle on that,” he said."
Ban Ordinance Adopted January 10, 2018
LASSEN NATIONAL FOREST (KPIX 5) - It's a massive crime scene, deep in Lassen National Forest. Through dense ground cover and brutal terrain, federal agents are making their way to what might well qualify as an industrial-scale farm operation. There are living quarters, kitchens, bathrooms and trash dumps, all for the purpose of growing a lot of marijuana.